Troubleshooting steps
Check communication wiring verify component connections check control board
HVAC Error Codes
E1 – Communication error
Communication error between components
Details
Communication error detected between control board and other system components.
Error typeerror
MeaningCommunication fault
Typical causesWiring fault component fault control board fault
SolutionsCheck communication wiring verify component connections check control board
Severitymedium
Catalog references
Where this appears
LennoxE1
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FAQ
Common questions
Which components?
Check wiring between control board and sensors or modules.
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